Growth performance and meat quality of Cobb 500 broilers fed phytase- and tannase-treated, sorghum-based diets

Abstract

act This study aimed to evaluate the effects of phytase and tannase addition in broiler diets on the growth performance and meat quality of broilers fed sorghum-based diets. Twelve experimental diets were formulated at three sorghum levels (0, 50, and 100%) and four enzyme levels (no enzyme, 5000 FTU phytase, 25 TU tannase, and a combination of 5000 FTU phytase + 25 TU tannase). Data on voluntary feed intake, average weekly weight gain, and feed conversion ratio were recorded and used to assess growth performance. Technical and nutritional parameters were used to determine meat quality. Broilers fed total sorghum diets with phytase and tannase enzyme combination had the highest feed intake in the first (24.4 ± 0.04 g/bird/day) and second weeks of life (23.0 ± 1.06 g/bird/day), respectively. Complete sorghum diets with phytase (83.0 ± 0.88 g/bird/day) and tannase (122.0 ± 0.88 g/bird/day) showed the highest feed intake in the third and fourth weeks, respectively. Broilers fed 50% sorghum diets with tannase (135.3 ± 0.05 g/bird/day) and complete maize diets with phytase (158.1 ± 0.88 g/bird/day) had the highest feed intake during weeks five and six, respectively. Broilers fed a 50% sorghum diet without enzymes showed the highest weight gain in the final week (606.5 ± 32.39 g). Comparable feed conversion was observed in birds fed complete maize and 50% sorghum diets. Dietary treatment substantially influenced the live body, carcass, liver, kidneys, abdominal fat pad weight, and intestinal length. However, it did not affect nutritional and technical parameters or Pectoralis major meat.